Improvement in metallurgic gas-furnaces



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- Metallurgic Gas-Furnaces. N0.]55,684. 1 Patented Oct. 6,1874.

A/l $155555 W, I

THE GRAPHIC C(LP QTD'LITNJSiI PARK FIJKEEJLY- UNITED STATES PATENT OEEIcE.

GEORGE C. SURLS, OF ROCHESTER, PENNSYLVANIA.

IMPROVEMENT IN ME TALLURGIC GAS-FURNACES.

Specification forming part of Letters Patent No. 155,684, dated October 6, 1874; application filed July 28, 1874.

To all whom it may concern:

Be it known that I, GEORGE O. SURLs, of Rochester, in the county of Beaver and State of Pennsylvania, have invented a new and useful Improvement in Furnaces for Metallurgic Purposes; andI do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawing, forming part of this specification, in which- Figure l is a planview of my improved furnace, the arches of a portion being removed to illustrate the inside construction of the same. Fig. 2 is a rear elevation of a portion of the same. Fig. 3 is an end View, and Fig. 4 is a front elevation, of the end furnace.

Like letters of reference indicate like parts in each.

-My improvement relates to an improved construction of that class of furnaces for metallurgioor other purposes; and it consists in the improved arrangement of the air and gas flues and the construction of the combustionchamber.

To enable others skilled in the art to make and use my invention, I will describe its construction and mode of operation.

The grate or gas-producing chamber is shown at a. It is provided with an arched roof, opening at the rear end into the combustion-chamber b, and with the fire-door o, and ash-pit d. Extending diagonally from the gas-producing chamber or furnace at are gasflues c, for conducting the gas from the chamber 00 to the portion or portions of the chamber 12, which are not opposite the fire-chamber. Entering on both sides the door 0 are air-flues f, which extend along the sides of the box a back of the wall a, and then ascending through the sides h of the furnace to the ports f, which stand at or just in the rear of the division-wall b of the gas-combustion chamber b. This arrangement of the air-flues brings the air as much as possible in contact with the fire in the chamber a, heating it up to a high degree before its discharge into the current of gas from the furnace, thereby producing a more intimate admixture with, and perfect combustion of, the latter.

The air-flues f may be passed through the division-Wall b, as at f, and the air fitted into the gases through small openings 9, on said wall.

The wall I) divides the chamber 12 into the upward flue and downward and diving flue, the latter having at its lower end a series of ports or openings, i, which lead tothe hearth of the metallurgic furnace, or the arches of the brick-kiln, or the holes of the glass-furnace, as the circumstances of its use may determine. As it is necessary that the number of these ports be considerable, and not necessary that the furnace-space a be large, for the production of a sufficient amount of gas, the area of the chambers b largely exceeds that of the chambers a.

It is found that the ports which are opposite to the point at which the gas enters the chambers are so much hotter than at the points opposite the dead-wall of the-furnace, that a serious difficulty attends the use of this class of furnaces, unless some provision is madefor the more equal distribution of the heat. This I accomplish .by the diagonal fines e, which cause the distribution of the gas to the points not opposite the chambers a. At various points I have provided temper or cooling holes k, for regulating the heat of the furnace, and peep-holes l, for viewing the condition of the chambers b. The center wall 1) causes the gas to be stopped in its passage to the ports 1', and distributes it to the various ports in a more equal manner.

I find the air heated in this way makes a more perfect combustion of the gas, and by causing the air to mingle with the gas at the point shown, I produce combustion prior to its passage through the ports 1, and thus protect the furnace in which the heat is used from the cutting influences of the intense initial flame.

Fig. 1 illustrates a nest of fur11aces,oshowing the manner in which my improvement is generally used.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination of the gas-producing chamber a, the distributing-fines e, and the chambers b.

2. In combination with the combustionchamber 1), the air-flues f within the side walls of chamber a, substantially as described.

3. The chamber 1), divided vertically by a wall b, in combination with the gas-chainber a and the ports 1', substantially as described.

In testimony whereof I, the said GEORGE G. SURLs, have hereunto set my hand.

GEORGE O. SURLS.

Witnesses SAM. J. ORoss B. F. ELLIS. 

